Help with error #n9!

I was installing dos 7.1 on a usb stick, and when i boot up from the usb stick, i get the following error: EMM386 has detected error #n9 in an application at memory address 00B8:45B4. Please help me.Specs: Dell Inspiron 1545Intel Pentium(R) Dual-Core CPU4.00 GB of Memory